STUD,LOCKED IN
Price to win
From deduped DIBBS award lines (unit cost × quantity). Not a bid recommendation — observed history only.
Average unit cost
$19.60
Weighted average
$18.06
Weighted by quantity
Observed range
$15.11–$33.88
Coverage
8 awards
Mar 29, 1998 – Mar 30, 2026
Average: $19.60 · Weighted avg: $18.06 · Range: $15.11–$33.88 · Based on 8 awards, Mar 29, 1998–Mar 30, 2026.
Unit cost by award date · 8 priced lines
DIBBS award history
Distinct award lines for this NSN (deduped). Line total is unit cost × quantity.
8 distinct award lines
| Date | Manufacturer | Qty × unit | Total | Contract |
|---|---|---|---|---|
| Mar 30, 2026 | 55345ALAMO AIRCRAFT, LTD.SAN ANTONIO, TXSAM | 87 × $33.88 | $2,948 | SPE4A126P0665P00001 |
| Oct 21, 2021 | 55345ALAMO AIRCRAFT, LTD.SAN ANTONIO, TXSAM | 182 × $22.22 | $4,044 | SPE4A622P1634 |
| Apr 13, 2009 | 55345ALAMO AIRCRAFT, LTD.SAN ANTONIO, TXSAM | 1,235 × $16.98 | $20,970 | SPM5AZ07D48240075 |
| Feb 19, 2009 | 55345ALAMO AIRCRAFT, LTD.SAN ANTONIO, TXSAM | 73 × $15.11 | $1,103 | SPM5AZ07D48240071 |
| Jul 31, 2007 | 5N116QUALITY SOCKET SCREW MANUFACTURINGENGLEWOOD, FLSAM | 205 × $15.50 | $3,178 | SPM5A607V0693 |
| Dec 20, 2006 | 0SYU2FASTENER DIMENSIONS INC.PENNSAUKEN, NJSAM | 144 × $16.38 | $2,359 | SPM5A407MQC91 |
| Jan 17, 2006 | 0SYU2FASTENER DIMENSIONS INC.PENNSAUKEN, NJSAM | 164 × $16.50 | $2,706 | SPM5A506MQ161 |
| Mar 29, 1998 | 5R793HOWMET GLOBAL FASTENING SYSTEMS INCSIMI VALLEY, CASAM | 200 × $20.20 | $4,040 | SP054098WQ761 |
Manufacturers who have won this NSN
Distinct CAGEs with a confirmed DIBBS award line for this part — each opens the manufacturer page.
Approved manufacturers
Qualified to supply per MCRL — no confirmed DIBBS award on record for this NSN. Each CAGE opens the manufacturer page.
PN MS51989-105D16
PN MS51989-105D16
PN MS51989-105D16
Characteristics
FLIS item characteristics from PUB LOG identification.
| Characteristic | Value |
|---|---|
| COTTER PIN HOLE DIAMETER | FIRST HOLE INCHES NOMINAL 0.076 |
| DISTANCE FROM COTTER PIN HOLE CENTERLINE TO NUT END | FIRST HOLE INCHES MINIMUM 0.145 AND INCHES MAXIMUM 0.175 |
| DISTANCE FROM SERRATED PORTION TO END OF STUD THREAD | INCHES MINIMUM 0.140 AND INCHES MAXIMUM 0.200 |
| DISTANCE FROM SERRATED PORTION TO NUT END | INCHES MINIMUM 0.985 AND INCHES MAXIMUM 1.015 |
| DISTANCE FROM SERRATED PORTION TO STUD END | INCHES MINIMUM 0.545 AND INCHES MAXIMUM 0.575 |
| HARDNESS RATING | ROCKWELL C MINIMUM 26.0 |
| LOCKING FEATURE | RING, LOCK SERRATED |
| MATERIAL | STEEL COMP 4130 |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL SPEC SINGLE MATERIAL RESPONSE -IL-S-6758 |
| NOMINAL THREAD SIZE | NUT THREAD INCHES 0.250 |
| OVERALL LENGTH | INCHES MINIMUM 1.530 AND INCHES MAXIMUM 1.590 |
| SERRATION INCLUDED ANGLE | DEGREES NOMINAL 86.0 |
| SERRATION QUANTITY | 17 |
| SURFACE FINISH | NUT THD MICROINCHES 32.0 |
| SURFACE TREATMENT | OVERALL CADMIUM AND CHROMATE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416 TY2 CL3 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | STUD THREAD RIGHT-HAND |
| THREAD LENGTH | NUT THREAD INCHES MINIMUM 0.485 AND INCHES MAXIMUM 0.515 |
| THREAD PITCH DIAMETERS | STUD THREAD INCHES 0.2778 TO 0.2795 |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | NUT THREAD UNF |
Open buys
DIBBS · quotes by Sep 28, 2026 · UNRESTRICTED