NSN 5305-01-346-1579 ER262140501C4, ER2621-405-01C4, ER262140501C4L1

Product Details | SOCKET HEAD CAP SCREW

5305-01-346-1579 An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.

Part Alternates: ER262140501C4, ER2621-405-01C4, ER262140501C4L1, ER2621-405-01C4L1, ER264277101D3, ER2642-771-01D3, ER264277101D3L1, ER2642-771-01D3L1, MIL-DTL-1222 TY II , MIL-DTL-1222 TY IIL1 , MIL-DTL-1222.37516UNC3AX1.125L1, MIL-DTL-1222.375-16UNC-3AZ1.125, MILDTL122237516UNC3AX1125L1, MILDTL122237516UNC3AZ1125, MILDTL1222TYII, MILDTL1222TYIIL1, MILDTL18240, MIL-DTL-18240 , MIL-DTL-18240.375-16UNC-3A1.125 , MIL-DTL-18240.37516UNC3A1.125L1 , MIL-DTL-18240.375-16UNC-3AX1.125, MIL-DTL-18240.37516UNC3XA1.125L1, MILDTL1824037516UNC3A1125, MILDTL1824037516UNC3A1125L1, MILDTL1824037516UNC3AX1125, MILDTL1824037516UNC3XA1125L1, MILDTL18240L1, MIL-DTL-18240L1 , MILF18240, MIL-F-18240, MILF18240L1, MIL-F-18240L1, QQN286GR500, QQN286GR500L1, 037516UNC3A1125, 037516UNC3A1125L1, 2621-405-11 ITEM125, 2621-405-11 ITEM125L1, 262140511ITEM125, 262140511ITEM125L1, 2641-405-01 ITEM 125, 2641-405-01 ITEM 125L1, 264140501ITEM125, 264140501ITEM125L1, 2641-405-11 PIECE 95, 2641-405-11 PIECE 95L1, 264140511PIECE95, 264140511PIECE95L1, 0.375-16UNC-3A-1.125 , 0.375-16UNC-3A-1.125L1 , 845-4687566 ITEM 23, 845-4687566 ITEM 23L1, 8454687566ITEM23, 8454687566ITEM23L1, 5305-01-346-1579, 01-346-1579, 5305013461579, 013461579

Hardware and Abrasives | Screws

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
53	28 SEP 1991	01-346-1579	16282 ( SCREW, CAP, SOCKET HEAD )

Part Number	Request Date	QTY	Origin
5305-01-346-1579	2025-07-183	800	us
MILDTL18240	2025-02-45	8	United States
GR500	2024-12-344	17	United States
5305-01-346-1579	2017-10-280	74	NECO
5305-01-346-1579	2011-11-322	184	NECO
5305-01-346-1579	2011-10-278	184	NECO
MILF18240	2011-04-118	1	AU
MIL-F-18240	2009-07-202	40	US

Cross Reference | NSN 5305-01-346-1579

Part Number	Cage Code	Manufacturer
0.375-16UNC-3A-1.125	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
0.375-16UNC-3A-1.125L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
2641-405-01 ITEM 125	96169	ELECTRIC BOAT CORPORATION
2641-405-01 ITEM 125L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
2641-405-11 PIECE 95	96169	ELECTRIC BOAT CORPORATION
2641-405-11 PIECE 95L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
845-4687566 ITEM 23	53711	NAVAL SEA SYSTEMS COMMAND
845-4687566 ITEM 23L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
ER2621-405-01C4	96169	ELECTRIC BOAT CORPORATION
ER2621-405-01C4L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
ER2642-771-01D3	96169	ELECTRIC BOAT CORPORATION
ER2642-771-01D3L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
MIL-DTL-1222 TY II	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MIL-DTL-1222 TY IIL1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
MIL-DTL-1222.375-16UNC-3AZ1.125	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MIL-DTL-1222.37516UNC3AX1.125L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
MIL-DTL-18240	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MIL-DTL-18240.375-16UNC-3A1.125	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MIL-DTL-18240.37516UNC3A1.125L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
MIL-DTL-18240L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
QQ-N-286,GR500	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
QQ-N-286,GR500L1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG

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Related Products | NSN 5305-01-346-1579

5305-01-346-1580, 5305-01-346-1581, 5305-01-346-1583, 5305-01-346-1912, 5305-01-346-2248

Technical Data | NSN 5305-01-346-1579

Characteristic	Specifications
THREAD SERIES DESIGNATOR	UNC
NOMINAL THREAD DIAMETER	0.375 INCHES
THREAD QUANTITY PER INCH	16
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
FASTENER LENGTH	1.125 INCHES NOMINAL
MATERIAL	NICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DEPARTURE FROM CITED DESIGNATOR	QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
CRITICALITY CODE JUSTIFICATION	ZZZX
MANUFACTURERS CODE	81349
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MIL-DTK-18240.375-16UNC-3AX1.125
MANUFACTURERS CODE	81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MIL-F-18240

Restrictions/Controls & Freight Information | NSN 5305-01-346-1579

Restrictions
Freight

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:	A	Item does not contain precious metal
Criticality Code:	S	The item is a non-aviation Critical Safety Item (CSI) whose failure will result in serious damage to equipment or serious injury or death to personnel.
Automatic Data Processing Equipment:	0	Represents 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
No Freight Information

Management | NSN 5305-01-346-1579

Navy

Category	Code	Description
Cognizance Codes	1H	Consumable material assigned to NAVICP MECH for inventory management Naval Inventory Control Point, Mechanicsburg
Special Material ID	L1	An items that supports either a SUBSAFE or Level 1 system that has undergone the extreme material control and quality assurance techniques that provide objective exidence of its acceptance for its appropriate application. Each item has certification papers (or special markings that provide traceability to the certification) that pedigree its material and physical properties, provide traceability, to manufacturer, contract list and lot, and document the quality assurance system and test requirements applied to the item.
Special Material Content	9	Non-Hazardous or Non-Sensitive Item, does not require hazardous or special handling, packaging or precautions
Source of Supply	NRP	NAVICP-ERP 700 Robbins Avenue Philadelphia, PA 19111-5098
Agency	DN	Department of the Navy
Service Organization	N	U.S. Navy
Reparability	M	Medium Demand Velocity Items (consumables)
Acquisition Advice Codes	D	DoD 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 Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each