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Technical Data Sheet
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26S8-8B — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN, material: STEEL COMP 4037 STUD, drive_type: CROSS RECESS, eyelet_length: 0.322 INCHES NOMINAL IN, stud_head_height: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System under NSN 5325-00-687-5689, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
26S8-8B
NSN: 5325-00-687-5689
FSC: 5325
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
diameter0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
materialSTEEL COMP 4037 STUD
drive_typeCROSS RECESS
eyelet_length0.322 INCHES NOMINAL IN
stud_head_height0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
end_item_identification1520-01-035-0266 HELICOPTER, UTILITY
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT FILLISTER
material_accommodated_thickness0.240 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-640 FED SPEC SINGLE MATERIAL RESPONSE EYELET
NSN5325-00-687-5689
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 26S8-8B · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-640 FED SPEC SINGLE MATERIAL RESPONSE EYELET
•
MATERIAL: STEEL COMP 4037 STUD
•
STUD ASSEMBLY STYLE: STUD ASSEMBLY
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.752 INCHES MINIMUM AND 0.767 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.240 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
•
STUD HEAD HEIGHT: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
•
DRIVE TYPE: CROSS RECESS
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-640 FED SPEC SINGLE MATERIAL RESPONSE EYELET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
MATERIALSTEEL COMP 4037 STUD
STUD ASSEMBLY STYLESTUD ASSEMBLY
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.752 INCHES MINIMUM AND 0.767 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.240 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
STUD HEAD HEIGHT0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
DRIVE TYPECROSS RECESS
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
EYELET LENGTH0.322 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
C37476080HInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2600-8InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
100101P3InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
7482576P207InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
26S8-8InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
BACS21EE8RInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26S8-8B?
26S8-8B is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 26S8-8B?
There are 13 known substitutes for 26S8-8B: C37476080H, 2600-8, 100101P3 and 10 more. Substitute compatibility should be verified for your specific system.
Is 26S8-8B still available?
26S8-8B is currently cancelled.
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Last verified: September 2026