BOLT, MACH 12 PT HD .250-28 X .625 (P/N ms9557-08) - New Surplus

Name: BOLT, MACH 12 PT HD .250-28 X .625
Brand: Aircraft Parts Store
SKU: ms9557-08
Availability: InStock

P/N: ms9557-08

Category: Bolts

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In Stock (214 available)

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This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).

Available Inventory

Condition	Stock
New Surplus	214 Available

Product Description

The MS9557-08 is a 12-point machine bolt with 1/4-28 UNJF thread and 0.625-inch length. Manufactured from A-286 alloy per AMS5731, this fastener provides superior corrosion and heat resistance for high-stress applications. The double-hex extended-washer head enables compact wrenching in confined spaces while distributing load across a wider bearing surface.

Commonly used to secure airframe and engine components requiring both strength and minimal installation envelope. Installation requires 3A thread engagement per MS9557 specification and torque per applicable aircraft maintenance manual.

Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.

Frequently Asked Questions

What is the BOLT, MACH 12 PT HD .250-28 X .625 (P/N ms9557-08)?

The MS9557-08 is a 12-point machine bolt with 1/4-28 UNJF thread and 0. 625-inch length.

What conditions is the ms9557-08 available in?

The ms9557-08 is currently available in the following conditions: New Surplus. Each condition reflects the part's maintenance history and certification status per FAA standards.

How do I get pricing for the ms9557-08?

The ms9557-08 requires a custom quote. Submit a Request for Quote (RFQ) through our website or call our sales team at (904) 998-9101 for immediate pricing assistance.

Do you offer expedited shipping for the ms9557-08?

Yes, we offer same-day processing on in-stock items and provide 24/7 AOG (Aircraft on Ground) support for urgent needs. Standard, expedited, and overnight shipping options are available.