NSN 5305-00-538-7818 BACB30LU48, BACB30LU4-8, 00-538-7818
Product Details | CLOSE TOLERANCE SCREW
5305-00-538-7818 A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
Part Alternates: BACB30LU48, BACB30LU4-8, 5305-00-538-7818, 00-538-7818, 5305005387818, 005387818
Hardware and Abrasives | Screws
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | 25 SEP 1974 | 00-538-7818 | 29294 ( SCREW, CLOSE TOLERANCE ) |
Drawings & Photos | NSN 5305-00-538-7818
Demand History | NSN 5305-00-538-7818
| Part Number | Request Date | QTY | Origin |
|---|---|---|---|
| BACB30LU4-8 | 2025-07-209 | 10069 | DIBBS |
| BACB30LU4-8 | 2025-07-201 | 10069 | DIBBS |
| 5305-00-538-7818 | 2025-06-167 | 1337 | US |
| BACB30LU4-8 | 2025-06-166 | 1327 | DIBBS |
| BACB30LU4-8 | 2025-03-61 | 8549 | DIBBS |
| BACB30LU4-8 | 2025-02-50 | 8549 | DIBBS |
| BACB30LU4-8 | 2024-08-231 | 193 | DIBBS |
| BACB30LU4-8 | 2024-05-140 | 8321 | DIBBS |
| BACB30LU48 | 2024-01-09 | 3800 | United States |
| 5305-00-538-7818 | 2023-08-223 | 15 | TW |
| BACB30LU4-8 | 2023-04-93 | 1254 | DIBBS |
| BACB30LU4-8 | 2023-01-23 | 1061 | DIBBS |
| BACB30LU4-8 | 2020-12-348 | 8525 | DIBBS |
| BACB30LU4-8 | 2018-10-284 | 100 | RO |
| 5305-00-538-7818 | 2018-08-240 | 7288 | DIBBS |
| 5305-00-538-7818 | 2017-11-316 | 8635 | DIBBS |
| 5305-00-538-7818 | 2017-11-306 | 8632 | DIBBS |
| 5305-00-538-7818 | 2017-08-234 | 8631 | DIBBS |
| 5305-00-538-7818 | 2017-08-225 | 8631 | DIBBS |
| 5305-00-538-7818 | 2017-05-128 | 4794 | DIBBS |
| 5305-00-538-7818 | 2017-04-120 | 4794 | DIBBS |
| 5305-00-538-7818 | 2010-10-291 | 4924 | DIBBS |
| 5305-00-538-7818 | 2009-05-150 | 3903 | DIBBS |
| 5305-00-538-7818 | 2009-03-75 | 1299 | DIBBS |
| 5305-00-538-7818 | 2008-06-156 | 2250 | DIBBS |
| 5305-00-538-7818 | 2008-01-16 | 232 | DIBBS |
Cross Reference | NSN 5305-00-538-7818
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| BACB30LU4-8 | 06710 | VALLEY-TODECO, INC. |
| BACB30LU4-8 | 06725 | SPS TECHNOLOGIES LLC DBA AIR INDUSTRIES |
| BACB30LU4-8 | 06950 | ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-8 | 17446 | HUCK INTERNATIONAL, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-8 | 17943 | FEDERAL MANUFACTURING CORPORATION |
| BACB30LU4-8 | 1RC86 | ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS |
| BACB30LU4-8 | 27624 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| BACB30LU4-8 | 56878 | SPS TECHNOLOGIES, LLC DBA AEROSPACE DIVISION |
| BACB30LU4-8 | 57928 | SONIC INDUSTRIES INC. |
| BACB30LU4-8 | 73197 | HI-SHEAR CORPORATION |
| BACB30LU4-8 | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP |
| BACB30LU4-8 | 81205 | THE BOEING COMPANY DBA BOEING |
| BACB30LU4-8 | 82918 | THE BOEING COMPANY DBA BOEING |
| BACB30LU4-8 | 97928 | HUCK INTL INC |
| BACB30LU4-8 | 98524 | MONOGRAM AEROSPACE FASTENERS, INC. |
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Related Products | NSN 5305-00-538-7818
Technical Data | NSN 5305-00-538-7818
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM |
| FASTENER LENGTH | 0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049RJGCAMS 6322 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | C50 FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | D1 CROSS RECESS TYPE 1 |
| GRIP LENGTH | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
Restrictions/Controls & Freight Information | NSN 5305-00-538-7818
| Category | Code | Description |
|---|---|---|
| Shelf-Life Code: | 0 | Nondeteriorative |
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| NMF Description | 093486 | BOLTS,NUTS OR SCREWS, NOI (SUB 3) |
| Less than car load rating | ||
| Less than truck load rating | W | Rating Variable |
| Water commodity Code | 713 | unknown |
| Originating Activity Code | KZ | Defense Supply Center Philadelphia Philadelphia, PA 19101 |
| Air Dimension Code | A | Shipment is not a consolidation and does not exceed 72 inches in any dimension. |
| Air Commodity | B | Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials. |
| Air Special Handling | Z | No special handling required. |
| Special Handling Code | 9 | unknonwn |
| HAZMAT | ||
| Type of Cargo | Z | No special type of cargo code applicable |
Management | NSN 5305-00-538-7818
Air Force
Navy| Category | Code | Description |
|---|---|---|
| Budget Code | 9 | General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors. |
| Fund Code | SF | Stock fund applicable to items managed for the Air Force by the respective Inventory Control Point. |
| Materiel Management Aggregation Code | SX | SX:AF SICA RESIDUAL MMAC-OC-ALC |
| Price Validation | V | The current standard price has been validated.
|
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DF | Department of the Air Force |
| Service Organization | F | U.S. Air Force |
| Reparability | N | Stock Fund (except Munitions) |
| Acquisition Advice Codes | Z | INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
Q EA : Each |
| Category | Code | Description |
|---|---|---|
| Cognizance Codes | 9B | Navy-owned stocks of DLA material Naval Inventory Control Point, Mechanicsburg |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DN | Department of the Navy |
| Service Organization | N | U.S. Navy |
| Acquisition Advice Codes | Z | INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
Q EA : Each |