The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-477-7210, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bath Iron Works Corporation. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-477-7210 |
| Primary Part Number | 8100-1256-0262 PC 56 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bath Iron Works Corporation |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-763,TYPE 316,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.745 INCHES MINIMUM AND 0.746 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.562 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | FLAT FILLISTER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.437 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Internal Drive Style | TORQUE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 8100-1256-0262 PC 56 PRIMARY | Bath Iron Works Corporation (USA) |
| Reference | Meaning |
|---|---|
| 8100-1256-0262 | D/9 Drawing number reference only Bath Iron Works Corporation |
NSN 5305-01-477-7210 is a Screw,externally Relieved Body, manufactured by Bath Iron Works Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-477-7210 has 1 manufacturer part number on file: 8100-1256-0262 PC 56 (Bath Iron Works Corporation).
Key specifications for 8100-1256-0262 PC 56: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 2.000 INCHES NOMINAL IN; Material Document and Classification: QQ-S-763,TYPE 316,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; First Diameter From Head: 0.745 INCHES MINIMUM AND 0.746 INCHES MAXIMUM IN. 16 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.