Cross reference · Space-Lok · Quick release pin
SLS4R cross referenceHartwell LG4SR, MS17987
SLS4R is a Space-Lok quick release pin series on 24 government stock numbers. Its closest equivalents are Hartwell LG4SR, MS17987. Each one is labeled with how strong the evidence is.
- Issued by Space-Lok
- Item Quick release pin
- Stock numbers 24
- Equivalents 19
- DLA paid $8.16 to $41.25
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- LG4SRHartwellCatalog only, needs approvalon 22 of 24 stock numbers, 22 sizes
11 more on one stock number each: BL4R23S, BLC4R24SM, BLC4RA40S, BLS4LA29S, BLS4LA29SM, BLS4R03SM, BLS4R04SM, BLS4R05SM, BLS4R06S, BLS4R06SM, BLS4R07S
- BL4R23SAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLC4R24SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLC4RA40SAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4LA29SAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4LA29SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R03SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R04SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R05SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R06SAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R06SMAvibankCatalog only, needs approvalon 1 of 24 stock numbers
- BLS4R07SAvibankCatalog only, needs approvalon 1 of 24 stock numbers
Standards
- MS17987MSCatalog only, needs approvalon 24 of 24 stock numbers, 25 sizes
- MS17987CMSCatalog only, needs approvalon 6 of 24 stock numbers, 6 sizes
- NAS1334S6SNASCatalog only, needs approvalon 2 of 24 stock numbers, 2 sizes
3 more on one stock number each: NAS1334A3S73D, NAS1334S6S15D, MS17986
- NAS1334A3S73DNASCatalog only, needs approvalon 1 of 24 stock numbers
- NAS1334S6S15DNASCatalog only, needs approvalon 1 of 24 stock numbers
- MS17986MSCatalog only, needs approvalon 1 of 24 stock numbers
Airframer and OEM drawings
1 more on one stock number each: B4035844
- B4035844US ArmyCatalog only, needs approvalon 1 of 24 stock numbers
Plus 6 reference numbers whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
Get quotes for SLS4R
Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
SpecLok has no catalog family for SLS4R. Tooling for the equivalents:
None of the equivalents is in the SpecLok catalog yet.
What the government paid
DLA awards on 3 of 24 stock numbers, 97 awards from 2024-01-07 to 2026-05-08.
Latest award per stock number: $8.16 to $41.25 each.
DLA production lead time: 46 to 222 days.
Per size in the table below.
DLA prices at DLA quantities, not a quote.Source
DLA award prices at DLA quantities and terms, not a commercial quote. Each award may bundle packaging, delivery and inspection terms that a commercial buy does not. Vendors are shown by CAGE code only.
Source: DLA FOIA Electronic Reading Room ↗, public FOIA releases. Files: 2023ContHist.zip/2023ContractHistory.txt, 2024ContHist.zip/2024ContractHistory.txt, contracthist2025.zip/contracthist2025.txt, 2026-09-16-1038_contracthist.zip/2026-09-16-1038_contracthist.txt.
Sizes by maker
| NSN | SLS4R | LG4SR | MS17987 | Last DLA price |
|---|---|---|---|---|
| 5315-00-051-1433 | SLS4R03 | LG4SR0300 | MS17987-403 | |
| 5315-00-051-1416 | SLS4R04 | LG4SR0400 | MS17987-404 | |
| 5315-00-051-1417 | SLS4R05 | LG4SR0500 | MS17987-405 | |
| 5315-00-051-1419 | SLS4R06 | LG4SR0600 | MS17987-406 | |
| 5315-00-051-2358 | SLS4R07 | LG4SR0700 | MS17987-407 | |
| 5315-00-051-2359 | SLS4R08 | LG4SR0800 | MS17987-408 | |
| 5315-00-051-2361 | SLS4R10 | LG4SR1000 | MS17987-410 | |
| 5315-00-051-2362 | SLS4R11 | LG4SR1100 | MS17987-411 | |
| 5315-00-051-2363 | SLS4R12 | LG4SR1200 | MS17987-412 | |
| 5315-00-051-2364 | SLS4R13 | LG4SR1300 | MS17987-413 | |
| 5315-00-924-1697 | SLS4R15 | LG4SR1500 | MS17987-415 | |
| 5315-00-051-2366 | SLS4R16 | LG4SR1600 | MS17987-416 | |
| 5315-00-051-2367 | SLS4R17 | LG4SR1700 | MS17987-417 | |
| 5315-00-051-2371 | SLS4R21 | LG4SR2100 | MS17987-421 | |
| 5315-00-051-2372 | SLS4R23 | MS17987-423 |
Show 9 more sizes
| NSN | SLS4R | LG4SR | MS17987 | Last DLA price |
|---|---|---|---|---|
| 5315-00-519-7406 | SLS4R24 | LG4SR2400 | MS17987-424 | $19.83 2025-12 |
| 5315-00-757-3471 | SLS4R25 | LG4SR2500 | MS17987-425 | |
| 5315-00-903-7564 | SLS4R26 | LG4SR2600 | MS17987-426 | |
| 5315-01-014-6274 | SLS4R29 | LG4SR2900 | MS17987-429 | |
| 5315-00-051-2374 | SLS4R30 | MS17987-430 | ||
| 5315-01-023-2665 | SLS4R32 | LG4SR3200 | MS17987-432 | |
| 5315-01-294-6840 | SLS4R36 | LG4SR3600 | MS17987-436 | $41.25 2025-05 |
| 5315-00-053-8545 | SLS4R40 | LG4SR4000 | MS17987-440 | $8.16 2026-05 |
| 5315-00-144-6755 | SLS4R73 | LG4SR7300 | MS17987-473 |
Each row is one National Stock Number and the part numbers DLA FLIS lists on it, as written there. A blank means FLIS lists no part in that series on the stock number, not that the size does not exist.
Sources and how to read this page.Details
Reference numbers the Federal Logistics Information System records against the same National Stock Number. A supply-catalog cross-reference, not an engineering-approved interchangeability: confirm against the controlling drawing or spec before substituting. Only equivalents marked cited have a manufacturer or government document, linked with each.
Source: DLA Federal Logistics Information System, via DLA PUB LOG ↗ (FLIS Data Electronic Reading Room ↗), data as of 2025-03-18 (March 2025 snapshot). Federal supply class 5315 Nails, machine keys and pins. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.
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