The Screw,machine, cataloged under National Stock Number 5305-01-478-3453, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-478-3453 |
| Primary Part Number | 77C731117-1 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Fastener Length | 15.7 MILLIMETERS MINIMUM AND 16.3 MILLIMETERS MAXIMUM MM |
| Screw Material Document and Classification | ASTM-B-446 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 12.28 MILLIMETERS NOMINAL MM |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | NICKEL ALLOY |
| Countersink Angle | 90.0 DEGREES NOMINAL |
| Thread Series Designator | M |
| Head Diameter | 11.7 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 77C731117-1 | Thales Uk Limited Dba Thales Uk Ltd Underwater Systems (GBR) |
| 991/4/16258/616 | Thales Uk Limited Dba Thales Uk Ltd Underwater Systems (GBR) |
| 77C731117-1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 77C731117-1 | Arnold Wragg Limited (GBR) |
NSN 5305-01-478-3453 is a Screw,machine, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-478-3453 has 4 manufacturer part numbers on file: 77C731117-1 (Thales Uk Limited Dba Thales Uk Ltd Underwater Systems), 991/4/16258/616 (Thales Uk Limited Dba Thales Uk Ltd Underwater Systems), 77C731117-1 (Lockheed Martin Corporation Div Rms), 77C731117-1 (Arnold Wragg Limited).
Key specifications for 77C731117-1: Fastener Length: 15.7 MILLIMETERS MINIMUM AND 16.3 MILLIMETERS MAXIMUM MM; Screw Material Document and Classification: ASTM-B-446 ASSN STD SINGLE MATERIAL RESPONSE; Thread Length: 12.28 MILLIMETERS NOMINAL MM; Head Style: FLAT COUNTERSUNK. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.