The Stud,locked in, cataloged under National Stock Number 5307-01-672-3894, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Microdot Products. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5307-01-672-3894 |
| Primary Part Number | 881B5MBH750 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Microdot Products |
| Status | ACTIVE |
| Distance From Serrated Portion to Nut End | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Thread Length | 0.547 INCHES MINIMUM NUT THREAD IN |
| Style Designator | LOCKED IN |
| Distance From Serrated Portion to End of Stud Thread | 0.040 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.3125 INCHES NUT THREAD IN |
| Distance From Serrated Portion to Stud End | 0.422 INCHES MINIMUM AND 0.452 INCHES MAXIMUM IN |
| Locking Feature | RING, LOCK KEYED |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Material | STEEL |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| 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 |
|---|---|
| 881B5MBH750 PRIMARY | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| 881B5MBH750 | Stanley Engineered Fastening Llc (USA) |
| Reference | Meaning |
|---|---|
| 881B5MBH7 | D/9 Drawing number reference only Stanley Engineered Fastening Llc |
NSN 5307-01-672-3894 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Microdot Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-672-3894 has 2 manufacturer part numbers on file: 881B5MBH750 (Howmet Global Fastening Systems Inc. Div Microdot Products), 881B5MBH750 (Stanley Engineered Fastening Llc).
Key specifications for 881B5MBH750: Distance From Serrated Portion to Nut End: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Thread Length: 0.547 INCHES MINIMUM NUT THREAD IN; Style Designator: LOCKED IN; Overall Length: 0.750 INCHES NOMINAL 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.