Product Details | CLOSE TOLERANCE SCREW

5305-01-057-9331 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: NAS1581A4T5, NAS1581F4T5, 10114927 , 5305-01-057-9331, 01-057-9331, 5305010579331, 010579331

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 21 MAR 1978 01-057-9331

Drawings & Photos | NSN 5305-01-057-9331


Demand History | NSN 5305-01-057-9331

Part Number Request Date QTY Origin
5305-01-057-9331 2026-04-106 11 DIBBS
5305-01-057-9331 2026-04-104 8 DIBBS
5305-01-057-9331 2026-04-104 372 DIBBS
5305-01-057-9331 2026-02-36 40 DIBBS
5305-01-057-9331 2024-03-64 250 United States
5305-01-057-9331 2021-11-305 119816 DIBBS
NAS1581A4T5 2021-01-06 63 United States
5305-01-057-9331 2020-08-217 90 US
5305-01-057-9331 2020-03-84 55762 DIBBS
5305-01-057-9331 2019-02-37 231757 DIBBS
5305-01-057-9331 2017-10-302 166774 DIBBS
5305-01-057-9331 2017-02-53 540 MANUAL
5305-01-057-9331 2015-10-281 135595 DIBBS
5305-01-057-9331 2015-09-273 134997 DIBBS
5305-01-057-9331 2015-04-112 134051 DIBBS
NAS1581A4T5 2015-03-65 100 Thailand
NAS1581F4T5 2014-09-272 100 United States
NAS1581F4T5 2012-01-31 272 United States
NAS1581A4T5 2012-01-06 600 United States
5305-01-057-9331 2011-08-220 138319 DIBBS
NAS1581A4T5 2011-04-110 600 United States
5305-01-057-9331 2011-01-12 150000 DIBBS
5305-01-057-9331 2010-08-239 100000 DIBBS
5305-01-057-9331 2010-05-139 140000 DIBBS
NAS1581A4T5 2010-05-127 10 Taiwan
5305-01-057-9331 2010-01-15 12279 DIBBS
5305-01-057-9331 2009-07-197 12279 DIBBS
5305-01-057-9331 2009-04-106 9814 DIBBS
5305-01-057-9331 2008-12-352 18048 DIBBS

Cross Reference | NSN 5305-01-057-9331

Part Number Cage Code Manufacturer
NAS1581A4T5 80205 NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES
NAS1581F4T5 80205 NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES

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Technical Data | NSN 5305-01-057-9331

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 0.403 INCHES NOMINAL
FASTENER LENGTH 0.700 INCHES MINIMUM AND 0.730 INCHES MAXIMUM
MATERIAL STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 6150 OR STEEL COMP 8735 OVERALL
SURFACE TREATMENT CADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
HEAD STYLE C50 FLAT COUNTERSUNK
HEAD DIAMETER 0.350 INCHES MINIMUM AND 0.398 INCHES MAXIMUM
COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE D8 TORQUE SET
GRIP LENGTH 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
GRIP DIAMETER 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SURFACE FINISH 32.0 MICROINCHES GRIP 32.0 MICROINCHES THREADS
SPECIFICATION/STANDARD DATA 80205-NAS1581 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD

Restrictions/Controls & Freight Information | NSN 5305-01-057-9331

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
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 5305-01-057-9331

Category Code Description
Budget Code9 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 CodeSFStock fund applicable to items managed for the Air Force by the respective Inventory Control Point.
Materiel Management Aggregation CodeSXSX:AF SICA RESIDUAL MMAC-OC-ALC
Price ValidationV The current standard price has been validated.
  • The item has been analyzed in conjunction with the Zero Overpricing Program and is in the accepted price range.
  • The item was procured under open competition and under the competitive arena the price is considered fair and reasonable.
  • ZOP or Standard price challenges are permissible but must be supported by adequate justification.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDFDepartment of the Air Force
Service OrganizationFU.S. Air Force
ReparabilityNStock Fund (except Munitions)
Acquisition Advice CodesDDoD INTEGRATED MATERIEL-MANAGED, STOCKED, AND ISSUED # Issue, transfer, or shipment is not subject to specialized controls other than those imposed by the Integrated Materiel Manager/Service supply policy. 1. The item is centrally managed, stocked, and issued. 2. Requisitions must contain the fund citation required to acquire the item. Requisitions will be submitted in accordance with Integrated Materiel Manager(IMM)/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
Q
EA : Each
Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesDDoD INTEGRATED MATERIEL-MANAGED, STOCKED, AND ISSUED # Issue, transfer, or shipment is not subject to specialized controls other than those imposed by the Integrated Materiel Manager/Service supply policy. 1. The item is centrally managed, stocked, and issued. 2. Requisitions must contain the fund citation required to acquire the item. Requisitions will be submitted in accordance with Integrated Materiel Manager(IMM)/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
Q
EA : Each