The Screw,close Tolerance, cataloged under National Stock Number 5305-01-487-6877, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-487-6877 |
| Primary Part Number | ST3M557-3-7 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.765 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Material Document and Classification | 23-118 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.2966 INCHES MINIMUM AND 0.3016 INCHES MAXIMUM 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 |
|---|---|
| ST3M557-3-7 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M557-3-7 | Bridgestone Americas Tire Operations, Llc (USA) |
| ST3M557-3-7 | Howmet Global Fastening Systems Inc (USA) |
| ST3M557-3-7 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M557-3-7 | West Coast Aerospace, Inc. (USA) |
| HT4027-3-7 | Howmet Global Fastening Systems Inc (USA) |
| ST3M557-3-7 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M557-3-7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4024-3-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-487-6877 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-487-6877 has 8 manufacturer part numbers on file: ST3M557-3-7 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), ST3M557-3-7 (Bridgestone Americas Tire Operations, Llc), ST3M557-3-7 (Howmet Global Fastening Systems Inc), ST3M557-3-7 (The Boeing Company Div Defense), ST3M557-3-7 (West Coast Aerospace, Inc.) and 3 more.
Key specifications for ST3M557-3-7: Fastener Length: 0.765 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN; Thread Length: 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN; Material Document and Classification: 23-118 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.190 INCHES IN. 12 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.