The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-339-1403, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is B & B Specialties Inc. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-339-1403 |
| Primary Part Number | W947A3005127 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | B & B Specialties Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN |
| Head Height | 0.078 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN |
| Fastener Length | 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Extended Washer Diameter | 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Thread Length | 0.184 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5731,COMP A286 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | QQ-S-766 FED SPEC ALL MATERIAL RESPONSES PRIMARY WASHER |
| First Diameter From Head | 0.090 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.213 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.271 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE FASTENER |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 FASTENER |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316L OR STEEL COMP 321 OR STEEL COMP 323 OR STEEL COMP 347 OR STEEL COMP 348 PRIMARY WASHER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| A3005127 | B & B Specialties Inc (USA) |
| W947A3005127 PRIMARY | B & B Specialties Inc (USA) |
| A3005127 | Fastener Technology Corp (USA) |
| A3005127 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| A3005127 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-01-339-1403 is a Screw,externally Relieved Body, manufactured by B & B Specialties Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-339-1403 has 4 manufacturer part numbers on file: A3005127 (B & B Specialties Inc), W947A3005127 (B & B Specialties Inc), A3005127 (Fastener Technology Corp), A3005127 (Fastener Innovation Technology, Inc. Dba F I T).
Key specifications for W947A3005127: Extended Washer Thickness: 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN; Head Height: 0.078 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN; Fastener Length: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER. 23 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.