Hafren KMRM-GEO Case Hardened Steel Geomet ® Kinmar ® Removable Bolts - KMRM0825-GEO, KMRM0840-GEO

Product overview

Hafren KMRM-GEO Case Hardened Steel Geomet ® Kinmar ® Removable Bolts

Hafren KMRM-GEO Case Hardened Steel Geomet ® Kinmar ® Removable Bolts are the ultimate high security patented two-way bolts. This advanced Hafren KMRM-GEO design requires a matching driver socket for installation and removal, ensuring guaranteed torque levels while allowing for versatile, cost-effective use. Unlike traditional shear bolts, these Geomet ® Kinmar Bolts leave no unplated surfaces, providing a clean, professional finish suitable for high-security and aesthetic-sensitive applications.

  • Also stocked in: Case Hardened Steel Zinc Plated (CR-3)
  • Other materials and finishes available to order, subject to minimum order quantities

Part Numbers: KMRM0825-GEO, KMRM0840-GEO.

Hafren KMRM-GEO – Features

Material: Case Hardened Steel (C10C interannealed)

Heat Treatment: Case Hardened

Finish: Geomet ® 500B

Part Numbers & Driver Sizes

Size Bolt Part No Driver Part No
M8 KMRM0825-GEO KM8R
M8 KMRM0840-GEO KM8R

Hafren Security Fasteners

Hafren Fasteners manufacture and supply security & tamper resistant fasteners; special headed screws, nuts & bolts. Their solutions are either permanent, or removable only by using a matching driver tool. They design and supply a wide range of security fasteners including bespoke made to measure security fasteners. If they don’t have what you need they’ll make it just the way you want.

Security: The need to safeguard against theft and vandalism is increasingly an essential part of many design specifications.

Safety: Complying with stringent Health & Safety Law, their fasteners keep the public safe.

Aesthetics: Security fasteners are not only secure and vandal-resistant, but aesthetically pleasing to the eye complementing their surrounding environment


For Additional Information on Hafren KMRM-GEO Case Hardened Steel Geomet ® Kinmar ® Removable Bolts, please consult the Technical Data Table or PDF Files below.

*Technical Data subject to change without notice.

FREE Technical Advisory Service
E-Tech Components UK Ltd maintains a free technical advisory service.
Contact us for enquiries concerning this and all other products: +44 (0) 1744 762 929

Technical Data

Part Number Size Driver Part Number Bolt Head Diameter (A Ø) Bolt Head Length (B) Length (L) Box Quantity
KMRM0825-GEO M8 KM8R 15.2 mm - 16.2 mm 7.6 mm - 8.2 mm 25 mm 100
KMRM0840-GEO M8 KM8R 15.2 mm - 16.2 mm 7.6 mm - 8.2 mm 40 mm 100

Product Video

Find out more about our products or becoming a supplier